Device for promoting and controlling combustion.



No. 705,635. Patented July 29, I902. E. BA'UMGARTNER. DEVICE FORPROMOTING AND CONTROLLING COMBUSTlON.

(Application filed. Jan. 7, 1 902.

(No Model.)

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UNITED STATES PATENT OFrIhE.

ERNEST BAUMGARTNER, OF FAIRVIEW, PENNSYLVANIA.

DEVICE FOR'PROMOTING -A ND CONTRDLLING COMBUSTION.

SPECIFICATION forming part of Letters Patent No. 705,635, dated July 29,1902.

Application filed January 7, 1902. Serial No- 88,730. (No model.)

To all whom it may concern.-

Be it known that I, ERNEST BAUMGARTNER, a citizen of the United States,residing at Fairview, in the county of Erie and State of Pennsylvania,have invented certain new and useful Improvements in Devices forPromoting and Controlling Combustion andI do hereby declarethe'following tobe a full, clear, and exact description of theinvention, such as will enable others skilled in the art to whichitappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,forming part of this specification.

My invention relates to improvements in devices for promoting andcontrolling combustion, and is designed to operate as a portion of astovepipe-flue, and has for its object the supplying of a limited amountof air to the top of the fuel in theastove after all of the ordinarydraft-openings of the stove are closed and operates to produce adownward current of air in the back part of the flue and an upwardcurrent of the products of combustion in the front and central part ofthe flue. The mechanism by means of which I accomplish these results ishereinafter set forth and described, and illustrated in the accompanyingdrawings, in which- Figure 1 is a vertical section of a portion of astovepipe or flue on the line or w in Fig. 3, embodying my invention.Fig. 2 is a vertical section of the same on the line y y in Fig. 8. Fig.3 is a longitudinal section of the same on the line 2 z in Fig. 2.

In the drawings illustrating my invention,

A is a section of a stovepipe or flue, in which,

above its junction with the stove, I secure a reduced section of flue B.This section B is provided with collars O G on its upper and lower ends,which closely fit the inside of the flue A, so as to leave an annularchamber D between the flues "Aand B and the collars O and O. In thischamber D, on the opposite sides thereof, I secure .vertical partitionscl d, which extend upward from the collar 0 nearly to the collar 0, andin the front of the flue A, I make an air-inlet openingE, which suppliesair to said chamber D at one side of the partition (1 d therein, and inthe collar G at the rear of the flue I make openings 0, so that airentering the opening E passes up around the reduced flue B and over thetops of the partitions d d and down on the opposite sides of saidpartitions and out through the holes 0 in the collar 0 and downward in aseparate air-current along the back of the flue to the top of the fuelin'the stove, while the products of combustion pass upward,

through the front and central portions of the flue inthe usual manner.By means of this construction I am enabled to utilize the well knownfeatures of an up anddown draft in the same flue and utilize it tosupply draftair to the top of the fuel ina stove, so as to promote areduced and limited combustion of the fuel when all of the ordinarydraftopenings of the stove areclosed.

Having thus described my invention, so as to enableothers to constructand use the same, what I claim as new, and desireto secure by LettersPatent of the United States, is-- The combination of a stovepipe orflue, a reduced flue-section inserted therein, annular collars on theupper and lower ends of said reduced flue-section fitting the inside ofthe pipe or fine in which it is inserted, vertical partitions at eachside of the reduced flue extending from the lower collar nearly to theupper collar thereon, an air-inlet opening or openings inthe front ofthe pipe or flue, communicating with the space between the reducedflue-section and the outer flue at one sideof said partitions, and anair-discharge opening or openings, through the lower collar at the rearof the flue, on the opposite side of said partitions, substantially asand for the purpose set forth. I

In testimony whereof I aftix my signature in presence of two witnesses.

ERNEST BAU'MGARTNER. Witnesses:

RALPH A. STURGEON, H. M. S'IURGEON.

